Water-cooled arch



F. H. BARNES WATER-COOLED ARCH Sept. 5, 1950 2 Sheets-Sheet 1 Filed 'Feb. 28, 1946 A TTOR/VE Y Sept. 5, 1950 F. H. BARNES 2,521,325

WATER-COOLED ARCH Filed Feb. 28, 1946 2 sheets-sheet 2 1 52 g I I a Q Jig. 5'.

ggii: I 55 L" I" V50 z0 1N VEN 7 31?. De oer/a/r ff. flames A T TOR/V5 Y UNITED .STATES PATENT? WATER-COOLED; Anon Frederick H., Barncs, Worcester, mechani m-X to The Ani'ericanfiSteel and Wire Companyof New .lersey, a corporation ofllew Jersey H "Application mam 28, 1946, Serial No. 650,809

This invention relates to a water cooled aiIch and more particularly to such an arch for use in open hearth furnaces. In these furnaces, doors ar provided for charging the scrap and hot metal into the furnace. Each of the door openings has an arch at the top thereof, which is a short distance below the skewback of the furnace. In most furnaces a refractory arch is used and is fairly satisfactory if there is sufficient distance between the top of the door frame and the skewback to build a strong arch. In some instances the distance between the skewback and the door opening is very small so that the arch must be very flat. This results in a weak arch, the bricks of which are knocked out in a very short time by the scrap being charged to the furnace. Before replacing the refractory arch, it is necessary to permit the furnace to cool down, thus losing several hours operating time. For this reason the furnace is often operated for a period of time without an arch which causes damage to the skewback channel and door frame.

It is an object of my invention to provide a water cooled door arch of substantial construction which will normally last for the campaign life of the furnace.

This and other objects will be more apparent after referring to the following specification and attached drawings, in which:

Figure 1 is a front elevation of the furnace opening with the arch in place;

Figure 2 is a view taken on the line II-II of Figure 1;

Figure 3 is a view takenon the line III-III of Figure 1;

Figure 4 is an enlarged view taken on the line IV-IV of Figure 2; and

Figure '5 is a view taken on the line V-V of Figure 2.

Referring more particularly to the drawings, the reference numeral 2 indicates the buckstays of the furnace, one of which is located on each side of the door opening. A door sill 4 extends between the buckstays and a water cooled door frame 6 extends upwardly therefrom. The door frame 6 is provided with a water chamber 8 and guides it! which slidably receive the furnace door l2. A refractory lining I4 is provided between the buckstays 2 and. the water cooled frame 6. A skewback channel I6 is fastened to the buckstays 2 adjacent the water chamber 8. The skewback channel I6 supports the skewback brick l8, from which the refractory arch 20 is sprung. The construction so far described is that commonly used in open hearth furnaces.

f Qrdinarily; a refractory door. archlis provided below the skewback channel. ,i 6, .but when the distance between the skewback' channel and the top of the door opening is small, as shown in the drawings, the door arch is destroyed in a short time. I propose to place a water cooled arch 22 directly below the skewback channel I6 and attach it to the buckstays 2. The arch 22 consists of a water tank 24 which may be made from a piece of boiler plate 26 bent as shown with the bottom of the tank slanting upwardly away from the door opening. By so shaping the plate 26, the danger of the bottom of the arch being pierced by the scrap being charged into the furnace, is greatly lessened. End walls 28, also of boiler plate, are welded to the bent plate 26 and protrude for some distance beyond the body of the tank 24. A water pipe 30 extends through each end wall. Baffle plates 32 are welded in place one-third of the distance from each end of the header as shown in Figure 5, and are provided with a plurality of openings 34 which cause turbulence in the water and force it against the sides of the tank 24. The plates 32 also act as stiifeners to strengthen the arch 22. Welded to the extended portion 28 of each end wall 28 is an angle 36 which extends outwardly from the furnace along side the buckstays 2. An angle 38 is fastened to each buckstay 2 and the angles 36 are bolted thereto in order to support the arch 22. Since the arch is fastened directly to the buckstays, the furnace can be operated with very thin front walls which is not possible when a refractory arch mounted on the refractory front walls is used. Each of the pipes 30 is connected to a flexible hose 40, one of which delivers water to the tank 24 while the other drains the water therefrom.

While one embodiment of my invention has been shown and described, it will be apparent that other adaptations and modifications may be made without departing from the scope of the following claims.

I claim:

1. A water cooled door arch for use in a furnace having a skewback channel located above a door opening, a vertical buckstay on each side of the door, each of said buckstays having a flange with its face in substantially the same plane as the back of the skewback channel, a door frame between the buckstays, and a refractory lining between each of the buckstays and the door frame, said arch comprising a metallic water tank located directly below said channel on said door frame above the door opening, said tank bearing against the said face of the flange of each of said buckstays and extending to that end of the flange remote from the door opening, and means connected to said tank beyond said end of flange extending outwardly from said flange to detachably fasten said arch to the buckstays independently of said door frame.

2. A water-cooleddoor arch for use in afurnac'e having a .skewback channel located above a door opening, a vertical buckstay on each side of the door, each of said buckstays having a flange with its face in substantially the same plane as the back of the skewback channel, a door frame between the buckstays, and arefractory lining between each of the buckstays and the door frame, said arch comprising a metallic water tank located directly below said channel on said door frame above the door opening, said tank bearing against the said face of the flange of each of said buckstays and extending to that end of the flange remote from the door opening, at least one transverse baffle plate located in said tank,

said bafile plate having a plurality of openings 4 therein, a water conduit connected to the tank at each end thereof, and means connected to said tank beyond said end of flange extending outwardly from said flange to detachably fasten said arch to the buckstays independently of said door frame.

FREDERICK I-I. BARNES.

REFERENCES CITED The following references are of record in the file of this patent:

'UNITED STATES PATENTS Number Name Date 1,142,713 Naismith June 8, 1915 1,168,648 Knox Jan. 18, 1916 1,275,943 Knox Aug. 13, 1918 1,456,205 Worton May 22, 1923 1,611,819 Davison Dec. 21, 1926 ,805,300 Victor May 12, 1931 1,836,784 Williams Dec. 15., 1931 2,107,185 McAfoos Feb. 1938 

